Ricoh Company, Ltd.

Shinzo Higuchi

Hiroshi Takahashi

Yasuo Suzuki

Hitoshi Iwatsuki

Akira Saito

Yasuyuki Yamashita

Kiichi Kamoda

Sohichiroh Iida

Nozomu Tamoto

Shigenori Yaguchi

Mitsuru Naruse

Yasutomo Aman

Toshiyuki Mutoh

Toshiyuki Iseki

Shinsuke Nagai

Yoshihiko Furugohri

Sohichiroh Lida

A resin powder for solid freeform fabrication has a 50 percent cumulative volume particle diameter of from 5 to 100 μm and a ratio (Mv/Mn) of a volume average particle diameter (Mv) to the number average particle diameter (Mn) of 2.50 or less and satisfies at least one of the following conditions (1) to (3):

Resin powder for solid freeform fabrication, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object

A resin powder for solid freeform fabrication includes a particle having a pillar-like form, wherein the ratio of the height of the particle to the diameter or the long side of the bottom of the particle is 0.5 to 2.0, the particle has a 50 percent cumulative volume particle diameter of from 5 to 200 μm, and the ratio (Mv/Mn) of the volume average particle diameter (Mv) to the number average particle diameter (Mn) of the particle is 2.00 or less.

Provided is a resin particle producing method including: a fiber aggregate producing step of directly joining fibers containing a thermoplastic resin with each other to obtain a fiber aggregate; and a particle forming step of forming the fiber aggregate into particles to obtain resin particles.

Resin particle producing method

A resin powder for solid freeform fabrication has a 50 percent cumulative volume particle diameter of from 5 to 100 &#x3bc;m and a ratio (Mv/Mn) of a volume average particle diameter (Mv) to the number average particle diameter (Mn) of 2.50 or less and satisfies at least one of the following conditions (1) to (3):

A powder for solid freeform fabrication includes a first resin particle and a second resin particle, wherein MFRis greater than MFRand a ratio of MFRto MFRis from 2 to 5, where MFRrepresents a melt mass-flow rate (MFR) of the first resin particle and MFRrepresents a melt mass-flow rate of the second resin particle.

Powder for solid freeform fabrication and method of manufacturing solid freeform fabrication object

A resin powder for solid freeform fabrication includes a particle having a pillar-like form, wherein the ratio of the height of the particle to the diameter or the long side of the bottom of the particle is 0.5 to 2.0, the particle has a 50 percent cumulative volume particle diameter of from 5 to 200 &#x3bc;m, and the ratio (Mv/Mn) of the volume average particle diameter (Mv) to the number average particle diameter (Mn) of the particle is 2.00 or less.

Resin powder having pillar shape and specific circularity for solid freeform fabrication, device for solid freeform fabrication object, and method of manufacturing solid freeform fabrication object

A resin powder for solid freeform fabrication, having a melting point of 100 degrees C. or higher as measured according to ISO 3146 regulation and a ratio of melt mass-flow rate B to melt mass-flow rate A of greater than 0.80 to 1.20, wherein the melt mass-flow rate A and the melt mass-flow rate B are respectively measured at 15 degrees C. higher than the melting point under a load of 2.16 kg according to JIS K7210 format before and after the resin powder is maintained at a temperature 15 degrees C. lower than the melting point under a pressure of 0.1 kPa for four hours.

Resin powder for solid freeform fabrication, device for fabricating solid freeform fabrication object, and resin powder

A particle for solid freeform fabrication having a columnar form has end surfaces and a side surface, wherein one of the end surfaces partially covers the side surface.

Particle for solid freeform fabrication, powder for solid freeform fabrication, device for manufacturing solid freeform fabrication object, method of manufacturing solid freeform fabrication object, and particle

A resin powder for solid freeform fabrication includes resin particles having a significantly pillar-like form including resin particles having a concave portion on the circumferential side surface.

Resin powder for solid freeform fabrication and device for solid freeform fabrication object

To provide a toner manufacturing method including: continuously mixing an oil phase with an aqueous phase to form an emulsified liquid using an emulsifying mechanism having an emulsified liquid circulation pathway and an emulsifying device equipped with a stirring blade; forming liquid droplets from the emulsified liquid by controlling the equilibrium between atomization and integration of the liquid droplets; and feeding the liquid droplets with stirring to a series of treatments including at least desolvation, filtration, washing and drying; wherein a product T of the solid content concentration (% by mass) of the oil phase and viscosity (mPa&#xb7;s) measured with a rotating viscometer at 25&#xb0; C., and 6 rpm satisfies 30,000&#x2266;T&#x2266;50,000.

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Tokyo, Japan

Shinzo Higuchi